#599BD3
Closest named color: Faded Blue (#658CBB). oklch(66.9% 0.108 245.9), rgb(89, 155, 211).
Aa
Black text reads best on this color (7.05:1).
About this color
#599BD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.108 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.047 away. Black text reads best on it, at 7.05:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.05:1 |
| White text | 2.97:1 |
Values
| HEX | #599BD3 |
| RGB | rgb(89, 155, 211) |
| HSL | hsl(208, 58%, 59%) |
| OKLCH | oklch(66.9% 0.108 245.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #599BD3 | 2.97:1 | Fails | Lc -61.5 | Content text, not long reading |
| Black text on #599BD3 | 7.05:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #599BD3 text on white | 2.97:1 | Fails | Lc 56.2 | Large or bold text, headings |
| #599BD3 text on black | 7.05:1 | AAA | Lc -45.6 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEC
oklch(88.6% 0.029 244.9)
-
Step 300
300
#A5C5E1
oklch(80.9% 0.053 244.9)
-
Step 400
400
#74A6D2
oklch(70.7% 0.084 245.9)
-
Step 500
500 (this color)
#599BD3
oklch(66.9% 0.108 245.9)
-
Step 600
600
#2D78B3
oklch(55.5% 0.117 246.1)
-
Step 700
700
#1F659A
oklch(49.1% 0.109 245.9)
-
Step 800
800
#1D537D
oklch(42.8% 0.09 245.8)
-
Step 900
900
#1E4564
oklch(37.8% 0.069 245.1)
-
Step 950
950
#13283B
oklch(26.9% 0.045 247.5)
#599BD3 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #839CD6 | 0.047 |
| Deuteranopia (no green cones) | #7390D2 | 0.038 |
| Tritanopia (no blue cones) | #00A8AE | 0.088 |
| Achromatopsia (no color) | #959595 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599BD3
#599BD3
oklch(66.9% 0.108 245.9)
- #C28748
#C28748
oklch(67% 0.108 65.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #599BD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.047
- Cornflower Blue #6495ED ΔE 0.048
- Chefchaouen Blue #4895EF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.053
- Greyblue #77A1B5 ΔE 0.060
- Silver Lake Blue #778DA9 ΔE 0.068
- Soft Blue #6488EA ΔE 0.069
- Dusty Blue #5A86AD ΔE 0.072
Use #599BD3 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.